a DSi XL with CFW natively running GBA games(not emulation). If it wasn't for minor inconveniences it would be the 2nd best way to play GBA games. : r/Gameboy
AGB FIRM Signature Patcher - GBA ROM Converter 3DS - GameBrew
3DS/2DS GBA to CIA Conversion and Save File Injection/Dumping Tutorial CFW ( GBA GB GBC NES SNES GG) - YouTube
Install GBA Games on 3DS - YouTube
Nintendo 3DS GBA Game Injection [GBA on 3DS] [Pokemon 128k Saves + RTC Support] | Digiex
Nintendo 3DS GBA Game Injection [GBA on 3DS] [Pokemon 128k Saves + RTC Support] | Digiex